Dust hood for buffing machines



y 929. J. w. Mama 1,722,353

DUST HOOD FOR BUFFING MACHINES Filed Nov. 20, 1928 3 Sheets-Sheet 1 July 30, 1929. J. w. MORRIS 3 DUST HOOD FOR BUFFING MACHINES Filed Nov. 20, 1926 3 Sheets-Sheet 2 MW w A Jul so; 1929,

Fig.5.

J. w. MORRIS 1,722,853

DUST HOOD FOR BUFFING MACHINES Filed Nov 20, 1926 3 Sheets-Sheet 3 Patented July 39, 1929.

err

treats rarer series.

JONAE w. MORRIS, or nnnroorr, NEW YORK, ASSIGNOR T0 nnnroorr aorrlvsolv CORPORATION, or nunrco'rr, new YORK, A ooaroaarrorv or NEW YORK.

DUST noon roa surrnve MACHINES.

This invention is a novel improvement in dust hoods for bufiing machines and the like, and the principal object thereof is to provide a simple, novel, and efiicient dust hood adapted to house the buffing or sand-papering wheels of buffing machines and the like, the hood being adapted to be connected with the suction dust piping of factories to carry off the dust created during the buffing operation.

Heretofore, bulfing machines have been usually equipped with hoods made by the manufacturer, and consisting merely of a casing comprising end members and an outer cover. A separate blower or fan is usually required for the hood of each machine, to draw the dust created during the bufling operation into exhaust pipes, usually connected in series, and leading into other pipes connected with a large exhaust chamber in which is located a primary suction fan.

The machines, when equipped with such covers, are very dusty in spite of the individual fan and the blower system, and a large amount of dust is scattered or dispersed under the machine, the dust which adheres to the surface of the sand-paper being thrown forwardly over the top of the bufling roller during its revolution, and

scatters in a cloud in front of roller above the point of contact of the leather or other material being sand papered or buffed. Such dust flies back more or less upon the body, arms, and face of the operator and is also disseminated throughout the room in which the machine is located. v

When, however, my hood is used with such machines, practically no dust cloud appears in front of the machine, andonly a very small amount of dust is dispersed below the machine in operation. In my hood. the dust which adheres to the sanded surface of the buffing wheel in its upward movement at the back of the roller. is drawn through slots or louvers at the back of the hood into a chamber, disposed between the inner lining and the outer cover, which chamber is connected directly with the main suction piping and avoids the mingling of currents set up in the ordinary hood, resulting from the downward and back motion of the air toward the exhaust and the upward and forward motion of the air in its contact with and adherence to the roller.

My hood carries away most of the dust which, is formed by the bufhng operation,

and in addition the suction from the general blower system is suflicient to bring about this result without the use of the usual individual fans. Also there is a material saving in cost and upkeep by the use of my hood; and the individual fan for each machine is dispensed with resulting in a saving in power, belting, oil and bearings, besides care and depreciation.

I will explain the invention with reference to the accompanying drawings which illus trate one practical embodiment thereof to enable others to adopt and use the same, and will summarize in theclaims the novel features of construction, and novel con1b ina-.

Fig. 3 is an enlarged transverse section through the hood.

Fig. & is a rear end view of the hood, de-

tached. I

Fig. 5 is a plan view of the hood, with the. cover member in opened position.

My novel dust hood is illustrated in the drawings in connection with a buffing machine of well-known type, said machine as shown comprising a builing-or sand papering wheel A, covered with a fine sand-paper or the like, mounted upon a shaft A supported in bearings upon a stand A said shaft A revolving downwardly from the operator, and having a pulley A at one end around which runs a belt A, whereby wheel A is rotated. In front of and cooperating with the wheel A is a roller B, covered with a layer of soft rubber or the like, roller B being journaled in a pivotal frame B mounted upona stand B the frame 13' being adapted to be rocked by depressinga foot lever B to bring the roller B into contact with the wheel A, but when foot lever- B is released the frame B will be rocked by spring B connecting frame B with stand A into normal position in which roller B is moved out of contact with wheel A. The

operator places one end of aside of'leather 1 L or the like between the rollers A and B, then depresses the foot lever B thereby movlng roller B towards the wheel A, whereupon the leather is brought into con- 1 'I II tact with the bumng roller A, and is drawn downwardly by motion of wheel A while the operator holc s the leather at about the middle ofits length and permits it to be drawn rs f hood for bufling machines comprises a case downwardly at such speed as to allow the wheel A to properly sand-paper or buff the surface of the leather. As soon a portion of the leather, the width of Wheel A and half the length of leather L, has been drawn downwardly past the buthng wheel A, the operator releases foot lever B and roller B automatically drops back towardsthe operator, and the operation is repeated until the entire width of leather has been buffed for abouthalf its length and then the operator changes ends and works upon the other half; such operations necessarily creat ing a large amount of leather dust, which if not carried away would scatter around the machine and permeate through the room in which the machine is located.

As shown in the drawings, my novel n and cover which are hingedly connected together at he back, said base compr a rear end plate 1, preferably substan ially funnel-shaped and terminating into a spent 1 adapted to be connected with the dust suction piping P of the factory or room. the sides of end plate 1 are side plates 2 and 3 which are connected to end plate 1 by means of flanges l at each side of end plate 1. I

Adjacent the lower edges of side plates 2 and 3 are openings 9f, 3 respectively, provided with pivoted closures 2 3 respectively, whereby the openings 2 3 be more or less closed, as desired, for controlling the draft or suction within the base of the hood.

The base is closed at its bottomby a bottom plate 4, connected to the lower ends of side plates 2 and 3, respectively in any desired manner. Bottom plate A is provided with an opening or recess 4 in its forward edge in conjunction with which is a slidable plate 4 having a depending flange portion 1-" whereby plate 4 may be adjusted for controlling the amount of draft or suction in the base of the hood.

The coverof the hood preferably comprises a substantially semicylindrical top plate 5, and parallel side plates 6 and 7, which side plates are preferably secured to flanges 5 on the sides of top plate 5 by welding, riveting or the like. The forward edge of top plate 5 is preferably flanged down wardly and inwardly as at 5 to form an apron, the edge of which is adapted to lie adjacent the periphery of bufling wheel A as shown in Fig. 1, for the purposehereinafter ct forth. The cover member 5 of the hood is hingedly connected at its rear end as at 8 to the upper edge of the end plate 1 of the base of the hood.

Side plates 6 and 7 of the cover are adapted to lie in the planes of the side plates 2 and 3 of the base, and at the meeting edges of plates 2, 6, and 3, 7, are opposed semicircular recesses 2, 6, 3, 7 adapted to form circular openings in the side plates of the hood for the passage of the shaft A of the butting wheel A, the hood being placed around the shaft A when the cover of the hood is hinged upwardly. Suitable clips 6*, 7 are mounted at the lower edges of plates 6 and 7 respectively to properly align the side plates and .to normally maintain the cover of the hood in proper relation to the base of the hood when in normal position as shown in Fig. 3.

l fithin the lower memberof the hood, spaced from and parallel with the end plate 1 thereof, is a v rtically disposcdbafie 9, secured to side plates 2 and 3 in any desired manner, said plate 9 extending from a point. adjacent the tops of side plates 2 3 to a point opposite the spout 1, there by dividing the base of the hood into an inner orbufling wheel: compartment, and an outer or dust compart nent, the compartments communicating below the lower edge of the plate 9. In the base below the baffle 9 andon the axis of spout 1 approximately, is a horizontally disposed baffle plate 10, which extends from a point infront of the baffle -9 to a'point the spout 1 V V lVithin the cover of the hood is an inner semicircular bafile plate 11, extending between the side plates 6 and 7 from a point substantially opposite the upper edge of bafa fie 9 of the base to a point adjacent the flange 5 said plate 11 being disposed parallel with the outer cover plate 5, and dividing the cover of the hood into an inner orybuffing wheel compartment, and an outer or dust compartment. Plate 11 is provided with a series or plurality of louvers 11 thereby establishing communication from the butling wheel compartment to'the dust compartment formed between the plates'5 and 11, Said louvers extending substantially the full width of plate 11, and having their flanges disposed at the upper edge of the openings and being bent inwardly towards cover plate 5, to prevent the dust fromthe dust compartment of the cover falling back into the hufling wheel compartments of the cover and base. Louvers 1 1 are likewise so shaped as to deflect the par icles of dust which are thrown off of thesanding wheel A into the space between the plates 5 and 11, from whence the dust is drawn by suction into the base and out through the spout 1? into pipe P.

adjacent the opening of The baffles 9 and 10 are so placed as to localize the exhaust and produce drafts of air which will carry the dust in the base into pipe P. Also, plates 4:, 2, 8", may be adjusted to more or less close openings 46, 2, 3 to regulate the suction within the base, for if the suction is too strong the leather will be drawn into the opening between the Wheel A and the bottom plate 42.

lVhile I have illustrated my novel hood in connection with leather buffing machines, obviously the same may be used on many other types of machines where hoods are necessary or desirable, as for instance, on sanding machines used in connection with grinding off heels of shoes, smoothing lasts, and for many other purposes, as well as for polishing wheels, emery wheels and the like. Therefore I do not limit the use of my hood to any particular type of machine; nor do I limit my invention to the exact form shown in the drawings for obviously changes may be made therein within the scope of the claims.

I claim:

1. For a buffing wheel, a dust hood casing comprising a bottom plate, an end plate, side plates, and a cover plate, an outlet in said end plate adapted to be connected with suction piping; a substantially semi-cylindrical baffle plate in said hood in rear of saidbufling wheel and having a plurality of louvers therein, said baffle extending substantially from the forward edge of the cover plate to a point substantially opposite the outlet;

and means in the casing for regulating the suction in said hood.

2. In a hood as set forth in claim 1, said suction regulating means comprising openings in the lower ends of the side plates in front of the bafiie; adjustable closures for said openings; said bottom plate having a recess in its forward edge; and an adjustable closure for said recess. 7

3. For a bufling wheel, a dust hood casing comprising a bottom plate, an end plate, side plates, and a substantially semi-cylindrical cover plate; the forward edge of the cover plate being flanged inwardly and adapted to lie adjacent the periphery of the wheel; an outlet in said end plate adapted to be connected with suction piping; a substantially semi-cylindrical baflle plate in said hood parallel with said cover plate and in rear of said wheel and having a plurality of louvers therein; said baffle extending substantially from the forward edge of the cover plate to a point substantially opposite the outlet; and means at the lower end of the casing for regulating the suction in said hood.

4. In a hood as set forth in claim 3, said suction regulating means comprising openings in the lower ends of the side plates in front of the baflle; adjustable closures for said openings; said bottom plate having a recess in its forward edge; and an adjustable closure for said recess.

In testimony that I claim the foregoing as my own I afiix my signature.

J ONAH W. MORRIS. 

